I tested a Microsoft wheelmouse, and it was same as Logitech; 0.1 per
click.
I tried a few different techniques massaging the deltas..
this one seemed to work well, as it avoids the scale, but lets the
single clicks through. This yielded a pretty reasonable "scroll" in
fltk's editor:
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+ // Under OSX, single mousewheel increments are 0.1,
+ // so make sure they show up as at least 1..
+ //
+ float dx = [theEvent deltaX]; if ( fabs(dx) < 1.0 ) dx = (dx > 0) ? 1.0 :
-1.0;
+ float dy = [theEvent deltaY]; if ( fabs(dy) < 1.0 ) dy = (dy > 0) ? 1.0 :
-1.0;
if ([theEvent deltaX] != 0) {
- Fl::e_dx = (int)-[theEvent deltaX];
+ Fl::e_dx = (int)-dx;
Fl::e_dy = 0;
if ( Fl::e_dx) Fl::handle( FL_MOUSEWHEEL, window );
} else if ([theEvent deltaY] != 0) {
Fl::e_dx = 0;
- Fl::e_dy = (int)-[theEvent deltaY];
+ Fl::e_dy = (int)-dy;
if ( Fl::e_dy) Fl::handle( FL_MOUSEWHEEL, window );
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